Electrical behavior of graphene under temperature effect and survey of I–T curve

Abstract

Graphene flakes were made from electrochemical exfoliation. To study graphene planes, different volumes of graphene solutions (1, 2, 4, and 7 ml) were sprayed on glass lamellae to get different graphene planes. I–V curve of all samples shows ohmic behavior with resistance in the order of kΩ which increases the slope of the I–V curve with increasing graphene planes (spray volume). The effect of temperature on all samples shows a clear jump in I–T curves. It is found that up to 150 °C current is almost constant, but after that current increases highly in the range of 1.8–10 times and resistance reduces sharply. Also, samples with lower graphene planes affected highly with temperature effect.

A Multifunctional Dysprosium‐Carboxylato 2D Metall–Organic Framework

“…This is not unusual for similar neutral 2D materials like graphene. [40] Clearly stabilization of the nanosheets is one important challenge we face for the possible use of single layers of compound 1.Delamination or exfoliation conditions for aneutral 2D MOF have been reviewed by Coronado et al in ar ecent communication where the authors achieve regularly shaped flakes of large lateral size and thickness of 3-4 layers. [24] Atomic Force Microscopy images (AFM) can be obtained from drop casted and spin coated dispersions of exfoliated nanosheets in various substrates.Figure 4shows AFM images of two single flakes on thermally oxidized silicon wafer spin coated at 500 rpm for 60 sa nd at 1000 rpm for 45 s. More images can be found in Supporting Information material Figure S8.…”

A Multifunctional Dysprosium‐Carboxylato 2D Metall–Organic Framework

“…The nanosheets seem to fold upon themselves on the TEM grid (carbon or lacey carbon Cu grids), as shown in Figure 3. This is not unusual for similar neutral 2D materials like graphene [40] . Clearly stabilization of the nanosheets is one important challenge we face for the possible use of single layers of compound 1 .…”

Monitoring of the Production Process and the Force Sensing Quality of a Reduced Graphene Oxide (rGO) Sensor

“…We removed the heat gun immediately when small parts of the sensor were blown off the wooden substrate and the silver electrode (Figure 2) by the strong airflow of the gun, which happened at the same time the conductance spiked up due to the reduction process (Figure 4). The sudden decrease (power law decay, Figure 4) of the conductance after reduction is evident, as temperature has a positive influence on the conductivity of graphene [6]. In contrast to metals, the conductance of Graphene increases during heating.…”